lib/archplat.sh: New file

2 files changed, 160 insertions, 0 deletions

diff --git a/lib/archplat.sh b/lib/archplat.sh
new file mode 100644
index 0000000..7100568
--- /dev/null
+++ b/lib/archplat.sh
@@ -0,0 +1,159 @@
+# Functions for matching architectures and platforms
+#
+# Copyright (C) 2012  Patrick "P. J." McDermott
+#
+# This file is part of the ProteanOS Development Kit.
+#
+# The ProteanOS Development Kit is free software: you can redistribute
+# it and/or modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# The ProteanOS Development Kit is distributed in the hope that it
+# will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with the ProteanOS Development Kit.  If not, see
+# <http://www.gnu.org/licenses/>.
+
+[ "x${_ARCHPLAT_SM+set}" = 'xset' ] && return 0
+_ARCHPLAT_SM=1
+
+match_arch()
+{
+	local arch="${1}"
+	local arch_field="${2}"
+	local a=
+	local a_ere=
+
+	for a in ${arch_field}; do
+
+		# "all" == "all"
+		if [ "${arch}" = 'all' ]; then
+			if [ "${a}" = 'all' ]; then
+				return 0
+			else
+				continue
+			fi
+		fi
+
+		# "foo-bar-baz" == "any"
+		if [ "${a}" = 'any' ]; then
+			return 0
+		fi
+
+		# Generate an ERE to match hyphenated architectures.
+		a_ere="$(printf '%s\n' "${a}" | sed \
+			's/^any-/[^-]+-/;s/-any-/-[^-]+-/g;s/-any$/-[^-]+/g')"
+
+		# "foo-bar-baz" == "foo-any-any"
+		if echo "${arch}" | grep -E "${a_ere}" >/dev/null 2>&1; then
+			return 0
+		fi
+
+	done
+
+	# Nothing matched.
+	return 1
+}
+
+match_plat()
+{
+	local plat="${1}"
+	local plat_field="${2}"
+	local p=
+
+	for p in ${plat_field}; do
+		if [ "x${plat}" = 'xall' ]; then
+			if [ "x${p}" = 'xall' ]; then
+				return 0
+			else
+				continue
+			fi
+		fi
+		if [ "x${p}" = 'xany' ]; then
+			return 0
+		fi
+		if [ "x${p}" = "x${plat}" ]; then
+			return 0
+		fi
+	done
+
+	return 1
+}
+
+arch_is_concerned()
+{
+	local host_arch="${1}"
+	local arches="${2}"
+	local arch=
+	local not_arch=
+	local seen_arch=
+
+	if [ "x${arches}" = 'x' ]; then
+		return 0
+	elif [ "x${host_arch}" = 'xall' ]; then
+		if [ "x${arches}" = 'xall' ]; then
+			return 0
+		else
+			return 1
+		fi
+	else
+		seen_arch=1
+		for arch in ${arches}; do
+			not_arch="${arch#!}"
+			if [ "x${not_arch}" != "x${arch}" ]; then
+				if match_arch "${host_arch}" "${not_arch}"
+				then
+					seen_arch=1
+					break
+				else
+					seen_arch=0
+				fi
+			elif match_arch "${host_arch}" "${arch}"; then
+				seen_arch=0
+				break
+			fi
+		done
+		return ${seen_arch}
+	fi
+}
+
+plat_is_concerned()
+{
+	local host_plat="${1}"
+	local plats="${2}"
+	local plat=
+	local not_plat=
+	local seen_plat=
+
+	if [ "x${plats}" = 'x' ]; then
+		return 0
+	elif [ "x${host_plat}" = 'xall' ]; then
+		if [ "x${plats}" = 'xall' ]; then
+			return 0
+		else
+			return 1
+		fi
+	else
+		seen_plat=1
+		for plat in ${plats}; do
+			not_plat="${plat#!}"
+			if [ "x${not_plat}" != "x${plat}" ]; then
+				if match_plat "${host_plat}" "${not_plat}"
+				then
+					seen_plat=1
+					break
+				else
+					seen_plat=0
+				fi
+			elif match_plat "${host_plat}" "${plat}"; then
+				seen_plat=0
+				break
+			fi
+		done
+		return ${seen_plat}
+	fi
+}
diff --git a/lib/local.mk b/lib/local.mk
index 30306d3..b8ae0b9 100644
--- a/lib/local.mk
+++ b/lib/local.mk
@@ -3,6 +3,7 @@ pkgdata_sources = \
 	lib/locale.sh \
 	lib/getopt.sh \
 	lib/fd.sh \
+	lib/archplat.sh \
 	lib/control.sh \
 	lib/feed.sh \
 	lib/pkg.sh \